Published in
Public Library of Science, PLoS Pathogens, 10(7), p. e1002279, 2011
DOI: 10.1371/journal.ppat.1002279
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- [www.ncbi.nlm.nih.gov] | PDF
Tools
Critical roles for LIGHT and its receptors in generating T cell-mediated immunity during Leishmania donovani infection
,
Meru Sheel,
Yonghong Zhou,
Fiona H. Amante,
Patrick T. Bunn,
Louise M. Randall,
Klau Pfeffer,
Stefanie Scheu,
Michael J. Hickey,
Bernadette M. Saunders,
Carl Ware,
Geoffrey Hill ,
Koji Tamada
and other authors.
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Abstract
LIGHT (TNFSF14) is a member of the TNF superfamily involved in inflammation and defence against infection. LIGHT signals via two cell-bound receptors; herpes virus entry mediator (HVEM) and lymphotoxin-beta receptor (LTβR). We found that LIGHT is critical for control of hepatic parasite growth in mice with visceral leishmaniasis (VL) caused by infection with the protozoan parasite Leishmania donovani. LIGHT-HVEM signalling is essential for early dendritic cell IL-12/IL-23p40 production, and the generation of IFNγ- and TNF-producing T cells that control hepatic infection. However, we also discovered that LIGHT-LTβR interactions suppress anti-parasitic immunity in the liver in the first 7 days of infection by mechanisms that restrict both CD4(+) T cell function and TNF-dependent microbicidal mechanisms. Thus, we have identified distinct roles for LIGHT in infection, and show that manipulation of interactions between LIGHT and its receptors may be used for therapeutic advantage.